Glaucoma

Key Points

• Glaucoma is a major cause of irreversible blindness and often progresses silently until visual loss is advanced.
• Typical risk profile includes older age, family history, diabetes, hypertension, chronic steroid exposure, and prior eye injury or surgery.
• Normal intraocular pressure is usually about 11-21 mm Hg, but optic-nerve injury can still occur at lower pressures in some patients.
• Open-angle disease is chronic and insidious; angle-closure disease can cause rapid pressure rise with acute severe symptoms.
• Early detection, medication adherence, lifestyle-risk reduction, and coordinated interdisciplinary follow-up are central nursing priorities.

Pathophysiology

Glaucoma is a progressive optic neuropathy in which retinal ganglion-cell axons are damaged over time, causing visual-field loss and potentially permanent blindness. A common mechanism is impaired balance between aqueous-humor production and drainage, which increases intraocular pressure (IOP) and compresses optic-nerve fibers.

In many patients, damage begins with peripheral vision loss and remains unnoticed until central vision is affected. Because lost vision is not restored, serial surveillance and early treatment are essential.

Classification

• Open-angle glaucoma: Iridocorneal angle remains open, but outflow resistance limits aqueous drainage and gradually increases optic-nerve damage risk.
• Angle-closure glaucoma: Drainage angle becomes obstructed and can trigger abrupt IOP elevation with acute pain and rapid vision-threat progression.

Nursing Assessment

NCLEX Focus

Prioritize recognition of acute angle-closure cues and trends in progressive peripheral vision loss that require urgent escalation.

• Assess risk profile: age older than about 60 years, family history, diabetes, hypertension, long-term corticosteroid exposure, and prior ocular trauma/surgery.
• Trend symptom patterns including blurred vision, halos or glare around lights, gradual peripheral-field loss, ocular redness/discomfort, brow or temporal headache, nausea, and vomiting.
• Check functional impact of visual change on mobility and safety, especially with low-light navigation and fall risk.
• Support ordered screening and diagnostic workflow: tonometry, visual-field testing, optic-nerve imaging, and corneal-thickness or perfusion assessment when indicated.
• Reinforce that diagnosis is clinical and ophthalmology-led rather than based on routine blood laboratory markers.

Nursing Interventions

• Escalate severe eye pain, sudden vision decline, headache with nausea/vomiting, or other acute angle-closure cues immediately.
• Support medication adherence and correct administration technique for pressure-lowering eye drops and ordered oral therapy.
• Monitor for systemic effects of topical beta-blocker therapy (for example hypotension or bradycardia) and report concerning trends.
• Trend blood pressure regularly when beta-blocker regimens are used because systemic absorption can lower pressure.
• Teach avoidance of activities that can transiently increase IOP (for example straining or prolonged dependent-head positioning) when clinically appropriate.
• Coordinate ophthalmology-directed procedural pathways (for example laser therapy or surgery) and reinforce peri-procedure teaching.
• Coordinate follow-up continuity with ophthalmology/optometry because lifelong surveillance is required to slow progression.
• Coordinate interdisciplinary support with pharmacy, social work, occupational therapy, and nurse-educator services to sustain home management.

Irreversible Vision Loss Risk

Delayed evaluation of acute glaucoma cues can result in permanent optic-nerve injury within a short time window.

Pharmacology

Drug Class	Examples	Key Nursing Considerations
antiglaucoma-medications	Timolol, latanoprost, brimonidine	Verify drop technique and adherence, and monitor both ocular response and systemic adverse effects.
ophthalmic-corticosteroids	Prednisolone acetate, dexamethasone	Long-term or inappropriate use can increase IOP and worsen glaucoma risk; reinforce monitoring and taper guidance.

Clinical Judgment Application

Clinical Scenario

A patient with diabetes and hypertension reports worsening halos, brow pain, and nausea with a new drop in peripheral vision.

• Recognize Cues: Vision change with pain and autonomic symptoms suggests possible acute pressure crisis.
• Analyze Cues: Risk factors and symptom cluster increase concern for angle-closure or rapidly worsening optic-nerve stress.
• Prioritize Hypotheses: Immediate priority is preventing irreversible visual loss from uncontrolled IOP.
• Generate Solutions: Activate urgent ophthalmic evaluation, review current medications, and prepare ordered pressure-lowering therapy.
• Take Action: Escalate immediately, administer prescribed treatment, and document symptom onset and progression.
• Evaluate Outcomes: Pain, nausea, and visual complaints stabilize and follow-up testing shows safer pressure trend.

Related Concepts

• eye-assessment-visual-acuity-and-common-abnormalities - Screening and trend recognition for glaucoma-risk findings.
• antiglaucoma-medications - Class-specific pressure-lowering therapy and safety monitoring.
• ophthalmic-medication-administration - Safe eye-drop technique that supports treatment effectiveness.
• assisting-with-sensory-deficits - Safety adaptation for clients with persistent visual impairment.